1 /* crypto/async/async.c */
3 * Written by Matt Caswell (matt@openssl.org) for the OpenSSL project.
5 /* ====================================================================
6 * Copyright (c) 2015 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
54 #include <openssl/crypto.h>
55 #include <openssl/async.h>
57 #include "async_locl.h"
59 #define ASYNC_JOB_RUNNING 0
60 #define ASYNC_JOB_PAUSING 1
61 #define ASYNC_JOB_PAUSED 2
62 #define ASYNC_JOB_STOPPING 3
65 static ASYNC_CTX *ASYNC_CTX_new(void)
67 ASYNC_CTX *nctx = NULL;
69 if(!(nctx = OPENSSL_malloc(sizeof (ASYNC_CTX)))) {
74 ASYNC_FIBRE_init_dispatcher(&nctx->dispatcher);
76 if(!ASYNC_set_ctx(nctx))
88 static int ASYNC_CTX_free(void)
91 OPENSSL_free(ASYNC_get_ctx());
94 if(!ASYNC_set_ctx(NULL))
100 static ASYNC_JOB *ASYNC_JOB_new(void)
102 ASYNC_JOB *job = NULL;
104 if(!(job = OPENSSL_malloc(sizeof (ASYNC_JOB)))) {
108 job->status = ASYNC_JOB_RUNNING;
109 job->funcargs = NULL;
114 static void ASYNC_JOB_free(ASYNC_JOB *job)
118 OPENSSL_free(job->funcargs);
119 ASYNC_FIBRE_free(&job->fibrectx);
124 void ASYNC_start_func(void)
129 job = ASYNC_get_ctx()->currjob;
130 job->ret = job->func(job->funcargs);
133 job->status = ASYNC_JOB_STOPPING;
134 if(!ASYNC_FIBRE_swapcontext(&job->fibrectx,
135 &ASYNC_get_ctx()->dispatcher, 0)) {
137 * Should not happen. Getting here will close the thread...can't do much
143 int ASYNC_start_job(ASYNC_JOB **job, int *ret, int (*func)(void *),
144 void *args, size_t size)
146 if(ASYNC_get_ctx() || !ASYNC_CTX_new()) {
151 ASYNC_get_ctx()->currjob = *job;
155 if(ASYNC_get_ctx()->currjob) {
156 if(ASYNC_get_ctx()->currjob->status == ASYNC_JOB_STOPPING) {
157 *ret = ASYNC_get_ctx()->currjob->ret;
158 ASYNC_JOB_free(ASYNC_get_ctx()->currjob);
159 ASYNC_get_ctx()->currjob = NULL;
165 if(ASYNC_get_ctx()->currjob->status == ASYNC_JOB_PAUSING) {
166 *job = ASYNC_get_ctx()->currjob;
167 ASYNC_get_ctx()->currjob->status = ASYNC_JOB_PAUSED;
172 if(ASYNC_get_ctx()->currjob->status == ASYNC_JOB_PAUSED) {
173 ASYNC_get_ctx()->currjob = *job;
174 /* Resume previous job */
175 if(!ASYNC_FIBRE_swapcontext(&ASYNC_get_ctx()->dispatcher,
176 &ASYNC_get_ctx()->currjob->fibrectx, 1))
181 /* Should not happen */
182 ASYNC_JOB_free(ASYNC_get_ctx()->currjob);
183 ASYNC_get_ctx()->currjob = NULL;
189 /* Start a new job */
190 if(!(ASYNC_get_ctx()->currjob = ASYNC_JOB_new())) {
196 ASYNC_get_ctx()->currjob->funcargs = OPENSSL_malloc(size);
197 if(!ASYNC_get_ctx()->currjob->funcargs) {
198 ASYNC_JOB_free(ASYNC_get_ctx()->currjob);
199 ASYNC_get_ctx()->currjob = NULL;
203 memcpy(ASYNC_get_ctx()->currjob->funcargs, args, size);
205 ASYNC_get_ctx()->currjob->funcargs = NULL;
208 ASYNC_get_ctx()->currjob->func = func;
209 ASYNC_FIBRE_makecontext(&ASYNC_get_ctx()->currjob->fibrectx);
210 if(!ASYNC_FIBRE_swapcontext(&ASYNC_get_ctx()->dispatcher,
211 &ASYNC_get_ctx()->currjob->fibrectx, 1))
216 ASYNC_JOB_free(ASYNC_get_ctx()->currjob);
217 ASYNC_get_ctx()->currjob = NULL;
224 int ASYNC_pause_job(void)
228 if(!ASYNC_get_ctx() || !ASYNC_get_ctx()->currjob)
231 job = ASYNC_get_ctx()->currjob;
232 job->status = ASYNC_JOB_PAUSING;
234 if(!ASYNC_FIBRE_swapcontext(&job->fibrectx,
235 &ASYNC_get_ctx()->dispatcher, 1)) {
243 int ASYNC_in_job(void)